I have the exact same issue and there is no way to get help. The "1 right answer" is wrong. Apple creates a randomly generated email address for third party developers. I get the same error message - paid for entire year - then the chat robot tells me they can't help. "What's your email address?" Over and over again. Had no clue what I was talking about. See photo
if you want to cancel but are unable to follow the steps described in the "how to cancel page", contact adobe support by using a browser that allows popups and cookies, contact adobe support by clicking here, https://helpx.adobe.com/contact.html?rghtup=autoOpen in the chat field (lower right), type AGENT be patient, it can take quite a while to reach a human inform the agent that you want to cancel.